The Magic in this Other World is Too Far Behind! (Manga) Volume 11 by Gamei Hitsuji

After the dramatic events that transpired in the imperial capital, Suimei continues the next leg of his journey in the Saadias Alliance, where he hopes to find a clue to help him get back to his world. Meanwhile, the alliance’s summoned hero is back from the frontline for a victory parade, where Suimei discovers her shocking identity and is forced to make new plans.